New 2ch pocket DSO+SG - Zeeweii DSO2512G

[Aldo22]

Where does Zeewii publish the updates?

Afaik, there are no publicly downloadable firmware updates yet.
They said that they would appear here, but that was a long time ago.

[RAPo]

We just wait and see.

[ptluis]

Thanks.
Keep up the good work.
 I'll wait for the update.
Where does Zeewii publish the updates?

i believe they will publish on their website when  there's a stable firmware. right now I'm dealing with a private email address from them.

[RAPo]

Thanks.
Please report back when there is a stable release.

[smg]

Btw, if you find bugs or have suggestions to improve the dso2512g please posts here, I'm collecting all i can find to send them. Thank you

- I lack the function of viewing CH1-CH2 or CH2-CH1.

- I also have 1.2.8C+ from ZEEWEII, if there is an improvement I would upgrade too.

[ptluis]

Btw, if you find bugs or have suggestions to improve the dso2512g please posts here, I'm collecting all i can find to send them. Thank you

- I lack the function of viewing CH1-CH2 or CH2-CH1.

could you elaborate more? what you mean? i think you're referring to the math functions? right?

btw on the next firmware release the "auto" button won't work anymore in zoom mode, that's the way they solve about 8 bugs I've found on zoom mode. i found 2 more and I'm doing some videos replicating the bugs to send them. The zoom feature it's still in development so it's normal some bugs.

[visenri]

Quote from: ptluis on July 29, 2023, 08:46:52 am

Btw, if you find bugs or have suggestions to improve the dso2512g please posts here, I'm collecting all i can find to send them. Thank you

Well, I'm glad you asked for that.
Suggestions / New features:

• Screenshots do not save the reference waveforms. Screenshots should save the screen including the reference waveforms.

• I miss some functionality for advanced triggering (in order of priority):

• Trigger holdoff (https://youtu.be/ta096oBzSac?t=646).
• Delay (trigger some time after the edge condition is detected).
• Nth edge trigger (Two parameters, idle time + number of edges).

I know, I may be asking for too much with the triggering modes, but it could make this device really stand out from the competition.

Bugs / improvements (issues also present in the 1 ch version):

• Stop does not stop:

In normal trigger mode:
After pressing stop, waveform can't be moved with cursor keys.
If new trigger condition arrives, image is updated (even in STOP!) and scrolling becomes possible.
This is only noticeable with non periodic signals, because with periodic signals the second trigger after stop happens all the time.

• After view mode, scope always goes back to run instead of remembering the last state:

After going to view mode to see some saved images, if you had a waveform stopped, you lose it when you exit from view mode, because it always puts the scope in RUN mode.

• Variable (and same) speed for all tools:

Waveform position (both directions): It has been improved over the 1ch version, It has a double speed, very comfortable to use.
For trigger level and measuring cursors: They should have the same double speed behavior as the waveform position, with the same speed levels.
In the current firmware: Trigger level: has just 1 fast speed, measuring cursors: have just 1 slow speed.

[visenri]

Detailed information about the "Nth Edge Trigger"

Trigger on the nth edge that happens after the specified idle time with no edges detected.

Ranges for other scopes:
Nth edge: 1 to 65535.
Idle time: 10ns to 10s.

Ranges that could be good enough for this scope:
Nth edge: 1 to 1023.
Idle time: 1us to 1s.

Steps:
Nth edge: 1.
Idle time, step could get bigger for bigger values:

• 1us to 99 us in steps of 1us
• 100 us to 990 us in steps of 10us
• 1000 us to 9900 us in steps of 100us
• 10 ms to 99 ms in steps of 1ms.
• 100 ms to 990 ms in steps of 10ms.

The suggested steps for "Idle time" would allow a simple interface with a +- and a "scale" label.

The +- would increment / decrement 1 step.
The "scale" label would switch the ranges, cycling: (100us -> 1000us -> 10000us -> 100ms -> 1000ms).

I attach an image showing how could the new trigger menu look like with all this new features.

[visenri]

By the way, another feature request to save battery:
AutoDim screen brightness when no button is pressed for a while.

The choices may be:
Disabled - 2 - 5 - 15 - 30 (minutes).

The brightness when dimmed could be 7 points bellow the selected level, so:

• At the default level it would be at minimum when dimmed.
• At maximum, it would be half brightness.

Ideally it would be better to turn the backlight completely off, but because there are no other indicators to show that the scope is ON, I think, dimming is the right way to do it.

[tatel]

Btw, if you find bugs or have suggestions to improve the dso2512g please posts here, I'm collecting all i can find to send them. Thank you

- I lack the function of viewing CH1-CH2 or CH2-CH1.

could you elaborate more? what you mean? i think you're referring to the math functions? right?

+1. Substracting one channel from the other allows to perform basic differential measurements. Usually analog oscilloscopes are able to do it. I can't understand how Zeeweii included FFT but forgot this basic feature. It could be enough for me to buy one...

[ptluis]

visenri what's your firmware version? and i will send your suggestions let's see what they do 

tatel i already sent this suggestion, in fact i suggested the same math functions as most bench scope support

I don't know if they will implement all the suggestions but at least they accept my emails and told me it will take a while but are working on that. let's see if they can surprise us.

For me it would be nice to have the scope full of functions, instead of the bandwidth race we see as argument for selling this mini scopes

[RAPo]

I have some enhancements too.
Could we have triggering on rise, fall or both?
Could we invert each channel separately? (that also makes the requested math functions easier)

[Aldo22]

Could we have triggering on rise, fall or both?

Could you explain?

[RAPo]

if I goto Tirg menu and the trig type, I can select either Rise or Fall. I would like to trigger on both.

[ptluis]

if I goto Tirg menu and the trig type, I can select either Rise or Fall. I would like to trigger on both.

I don't know if there's such trigger type, but the holdoff trigger should do what you desire, but i don't know what exactly you want to capture 

[RAPo]

if I goto Tirg menu and the trig type, I can select either Rise or Fall. I would like to trigger on both.

I don't know if there's such trigger type, but the holdoff trigger should do what you desire, but i don't know what exactly you want to capture 

jitter on data signals, see image

[ptluis]

if I goto Tirg menu and the trig type, I can select either Rise or Fall. I would like to trigger on both.

I don't know if there's such trigger type, but the holdoff trigger should do what you desire, but i don't know what exactly you want to capture 

jitter on data signals, see image

ok i see, i will add this to the suggestion list I'm going to send to the engineers and let's see if they add it

[visenri]

visenri what's your firmware version? and i will send your suggestions let's see what they do

1.2.8C

For me it would be nice to have the scope full of functions, instead of the bandwidth race we see as argument for selling this mini scopes

The actual bandwidth of this scope is good enough for most use cases (less could be an issue, this devices has the right price/bandwidth/size).
Indeed I would also rather add new features than increasing bandwidth.
Many cheap/small scopes have issues even with basic trigger, this one works well, and advanced triggering could make it much more useful.

if I goto Tirg menu and the trig type, I can select either Rise or Fall. I would like to trigger on both.

I don't know if there's such trigger type, but the holdoff trigger should do what you desire, but i don't know what exactly you want to capture 

As already pointed out, it exists, my Rigol 1054z also has it.

[ptluis]

As already pointed out, it exists, my Rigol 1054z also has it.

hello can you tell me where i can find the option to trigger rise and fall on rigol ds1054z?

[RAPo]

As already pointed out, it exists, my Rigol 1054z also has it.

hello can you tell me where i can find the option to trigger rise and fall on rigol ds1054z?

chapter 5 user manual, Edge type/slope

[RAPo]

I discovered that the Hantek TO1112D tablet oscilloscope just like the Rigol 1054z can trigger on both edges simultaneously.

[ptluis]

I discovered that the Hantek TO1112D tablet oscilloscope just like the Rigol 1054z can trigger on both edges simultaneously.

I saw that too but it's another price range, in fact i think it's to expensive for the specs. from the reviews i saw it could be better. .

[Aldo22]

You can use some LPF filter with cut-off at about 20-30 MHz on the input to fix that issue. Do you have LPF filter for testing?

Now I happen to have a very simple one because there is a 30MHz low pass filter in the RF test board (for Nanovna).

This calms everything down. Hardly any "ripple" to see.
From 10MHz square wave, of course, everything seems ironed out.
So it is almost as "calming" as an old CRO. 

[RAPo]

true, but I got a really good deal: from 1 July 2023, all marketplaces are required by EU law to collect Value-Added Tax and remit to the competent tax authority under certain circumstances.
The seller did lower the price with the tax amount, but the tax/customs department didn't add the tax, so I got a 200 euro scope for 164 euros ;-)

[RAPo]

Now I happen to have a very simple one because there is a 30MHz low pass filter in the RF test board (for Nanovna).

Thanks, I forgot that!